<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>盒子模型</title>
    <link rel="stylesheet" href="box-model.css">
</head>

<body>
    <div class="block-div" id="block-div-1">
        block div
    </div>

    <div class="block-div" id="block-div-2">
        block div
    </div>

    <div class="inline-div" id="inline-div-1">
        inline div 1
    </div>

    <div class="inline-div" id="inline-div-2">
        inline div 2
    </div>
</body>

</html>